Alternating current signal conversion method

The invention discloses an alternating current signal conversion method. Alternating current input signals are converted by adopting a plurality of sensors or a plurality of conversion circuits; a conversion process is divided into different gears; each gear ensures that the alternating current signal of the gear is converted into a required output signal in a fixed range; different gears of a required output signal in a fixed range are switched at a zero crossing point of the required output signal in the fixed range, so that the time sequence continuity of the required output signal in the fixed range in a utilization process after conversion is ensured. 一种交流信号变换的方法，将交流输入信号采用多个传感器或者多个变换电路进行变换，变换过程分成不同的档位，每个档位保证把本档位的交流信号变换为一个需要的固定范围的输出信号，一个需要的固定范围的输出信号的不同档位在一个需要的固定范围的输出信号的过零点进行切换，保证一个需要的固定范围的输出信号在变换后的利用过程中时序上的连续性。